Process of welding



Patented ll,

WW- r; wer were 5 e HENRY W. SCHQEll-FELDT, GESTAV A. 1%

EIHHARDT, AND ELl'vll'ER 'l. MCCLEARY, 5J1

YOUNGEZTGWN, GEEK).

FROG 3 OF WELDING.

Ii'o Drawing.

To all ill/mm. it may concern:

Be it known that we, HENRY W. Sorronn- FELDT, (ltrs'mv A. Rnmnnuor, andEmunn T. MoCLnAnY, citizens of the United States, residing atYoungstown, in the county of Mahoning and State of (lhio, have inventeda new and useful Improvement -in Processes of ll elding, of which thefollowing is a full, clear, and exact description.

The present invention relates to a process of welding. In our process,metal is superheated in a furnace and applied to the place where theweld ls to be made. The metal as applied is superheated to a temperaturesufficient to raise the surface where the weld is to he made to thewelding point.

The process may be carried out for welding together two or more piecesof metal, in which case the superheated metal is applied, preferably bypouring into a mold, to the surfaces of the solid mean where the weld isto be made. The process may also be used Where the superheated metal,after solidifw ing, forms the pieceto be added by welding, such, forexample, as replacing a piece hroken or chipped from a casting, orfilling up defective places in a casting or other metal article to hemended.

The metal is superheated in any suitable furnace, such as an electricfurnace or a furnace tired by gas, oil, coal, or other suitable fuel: Weprefer to use an electric furnace because the super-heating can becarried out more readily and under better controlled temperatureconditions. By superheating is meant. heating of the liquid metalconsiderably above its melting point. In the case offerrous metal, suchas steel or iron, we prefer to super-heat the metal to a temperaturewhich we believe to he in the neighborhood of 2700 F. or perhaps higher,although the temperature will be governed to a greatextent by theparticular character of the Weld to be made.

In welding two pieces of iron or steel together, the ends which are tobe welded together are preferably enclosed in a mold of molding sand orthe like to confine the liquid metal which is tohe. applied to thesurfaces to be welded. The superheated metal is then tapped from thefurnace and is poured in its superheated condition. The metal as pouredshould retain its superheat so that it will raise the surfaces of thesolid metal to scribed.

. at least about 2700 Application filed Septemher 12, 1922. Bartel No.587,824.

which it is applied, to the welding point, thereby insuring a firmwelded joint between the solid metal and the liquid metal appliedthereto. Ordinarily, liquid metal will hot weld to solid metal, becauseof the fact that, the surface of the solid metal is not raised 6 to thewelding point.

By superheating the metal in a furnace, we can insure that the weldingmetal has the right chemical composition, and that it is applied at thebest temperature to form a solid and substantial weld. We can thus avoidporosity and blow-holes in welds made by the use of the materials whichwe have found result from a too high'and uncontrolled temperatureproduccd by exothermic I0 reactions.

If desired, the solid pier-cs of metal maybe heated in the region of theweld to a tem-. pe 'aturc below but close to the welding temperature, inwhich case the welding metal'w applied need not a temperature.

, The present invention is not limited to all of the details abovedescribed, but maybe embodied in weldin processes within these besuperheated tosohigh I y.- a scope of thefollowing claims.

We claim:

l." The process of welding, including the steps of slower-heating metalin a furnace and forming the weld with the furnace superheated metal,substantially as de-' '2. The process of welding, including the steps ofsuperheatingr metal in a furnace and applying the thus superheated metalto the 99 A surface at which theweld is to be made, at a temperaturesufliciently high toraise such surface to the welding point, suhstantially as described. v v 3.' The process of welding ferrous metals, 95.including theste'ps of superhcat'ing a ferrous metal in a furnace andapplying the thus superheatcdjcrrous metal to the surface at whichtheweld is to be made at a temperature suiliciently high. to raise such 1%surface to the welding point, substantially as described.

4. The process of welding ferrous metals, including the steps orsuperheating a ferrous metal in a furnace to F. and forming' the Weldwith the furnace superheated ferrous metal, substantially as described.

a temperature of ferrousmetul, substantially as described.

6. The process of welding, including the steps of preheating the surfaceat which the weld is to be made to a temperature below the weldingpoint, superheutingr metal in a fur-mice, and applying the thussuperheated metal to the surface ntv which the weld is to be made,substantially as descril'ied.

'2'. The process of welding metal. including the steps of preheating thesolid metal surface at which the weld is to be made to a temperaturebelow its welding point, supeiw heating in a furnace ametal ofsubstantially the same chemical composition as the solid metal, andapplying the furnace superheab ed metal to the surface at which the weldis to be rude, substantially as described.

'8. The process of welding together two or more p eces of SQllLl metal,including; the

ferrous metals,

memes steps of superheating a body of the same 2 metal in a furnace, andapplying thefurmace-superheated metal to the pieces to be welded,substantially. its described. 7

[9. The process of welding together two or more pieces of solid metal,including the 9 steps of preheatiiu, the pieces of solid metal 'in theregion of the weld to etemperature below their welding; point,superheating a.

body of the, same metal ine furnace, and applying the furnacesuperl'leated metal to 35 form the weld, substantially as described.

lb. The; process of welding, including the steps-pf superheating-metalin an electric furnace 'under controlled temperature conditions andforming v furnace superheated metal, substantially as described.

Iii/testimony whereof we have hereunto set 'our'ehands.

I), l I

'HENRY \V. SCHOENFELDT. (lUST-AV A. REINHARDT. ELMER T. MeCLEA-RK,

the weld withthe t0

